The Book of Blood and Shadow by Robin Wasserman
In The Book of Blood and Shadow, we follow Nora (hehe), a smart senior/Latin nerd at a prep school, and her three best friends. They land spots in a special study class to try to interpret a book that no one has been able to in the 400-some years since it was written. It turns out that an organization is keeping and eye on everyone who shows interest in the book, and once they start to make progress things start…